LIBRARY

474 COLLEGE ENTOMOLOGY
Hal£sidota fItibner includes the three important North American species,
the silver-spotted halisidota, H. argenta(a Packard, which feeds on conifers;
the hickory tiger moth, H. caryce (Harris), on hickory and other hardwood
forest trees; and the spotted halisidota, H. maculata (Harris), on a large number
of deciduous trees and shrubs.
Hyphantria Harris, the so-called fall webworms, derive the common names
from the large colonies of gregarious caterpillars that. envelop whole limbs in
webs within which they feed. These webs are most evident in summer and fall
and are not to be confused with the more compact webs or tents of the tent
caterpillars which appear in the early spring. The two most important North
American species are the beautiful white moths designated as the spotless fall
webworm, H. te."dOT Harris, and the fall webworm, H. cunea (Drury). The
long-haired caterpillars are forest and orchard inhabitants that feed upon
broad-leaved deciduous trees and shrubs.
Isia Walker embraces the well-known Isabella tiger moth or banded woolly
bear, I. isabella (Abbot and Smith), a dull orange-yellow, black-spotted moth,
the densely hairy larv